Process for making a decolorizer.



r'nnnEnIckw. srnnnrrns, or HnsrInGs-UroN-HUnson, new, ronx, nssrenon 'roran CHEMICAL COMPANY, or HAsrmcs-UPon-HUnson, NEW YonK, A oonrone- TIGN'OF NEW YORK.

PROCESS FOR MAKING A 119E601:ORIZIIEIB.

Ito Drawing.

To all whom it may concern Be it known that l[, FREDERICK W. SPANU-TIUS, of Hastingsvupon-Hudson, in the county of Westchester and State ofNew York, have invented a new and useful Process for Making aDecolorizer, of which the following is a specification.

My invention relates to the manufacture I of decolorizer and my mainobject is to provide a decolorizer which is not only superior to thoseheretofore known but is cheaper to manufacture.

My invention consists mainly in utilizing rectly from the mixture by theintroduction of an acid, this rocess being more fully described in U.Letters Patent to Jarrett No. 572345 dated December 1, 1896.

The residue obtained from the filtration step of the above describedprocess is what I use and it is usually inthe formof a filter press cakeand usually contains moisture, the remainder bein crude'fiber of theoriginal argols with smal quantities of lime salts and sand. Ihave-discovered that if this is burned in a closed retort provided witha small opening for the escape of vapor and gases formed ring thecarbonization there is obtained upon heating totheproper temperaturevuntil the'carbonlzation' 1S complete, a residual vegetable charcoalwhich is s an excellent decolorizer. This residue contains much less oflime salts than bone-black which has heretofore been used, and as it 1s1 Patented ape. is, rare.

Application filed February 7, 1912. Sena 1N0. emcee.

tirely and easily removed in the ordinary' process of purification ofliquors without resorting to extra treatments.

An important advantage is that the product is made from a part of theoriginal tartrate-bearing material and so avoids the introduction ofelements and substances forsign to the tartrates or their naturalsource.

I have found that my process results in a product which is superior inevery way to any decolorizer of tartrate solutions heretofore known.

The'cost is very; small when compared to the value as a decolorizer.Furthermore it provides the cheapest and best method of disposal of aresidue which has heretofore been hauled off at some expense and this isespecially important in a factory at some distance from a garbagedumping ground.

Moreover the gases given off in the retort are not a nuisance becausethey are combustible and can be entirely consumed in the I furnaceitself.

Another advantage in the use of my process is that the expense and dirtconnected with handling and grinding the materials "heretofore used isdone away with because the product is-made from an article which hasalready been very finely ground.

The product resulting from my process is primarily for use indecolorizing, purifying and clarifying the solutions extracted from thematerials of which the insoluble residue is subjected to my new process.

In the particular case described above I treat by my process the filterpress cake from ,argols and lees, the product resulting being used forthe decolorization, purificatlon and clarification of liquors used inthe production of cream of tartar, Rochelle salts, tartaric acid andsuch compounds as are made from argols and lees and other crudetartrates and tartaric acid substances.

What I claim is 1. The method of making a decolorizer consistingintreating argols with an alkali,

separating the residue from the solution and heating the; residue untilcarbonization is complete. p

2. The method of making a decolorizer .con'sistin in dissolving argolsin caustic soda, ad ingpotassium chlorid, separating the residue fromthe solution and heating the residue until carbonization is complete.

3. lhemethod of'making' a decolorizer consisting inftreating argolresidue with hot water, separating the solution from the residuewhich-remains after said treatment and heating said last mentionedresidue untilcarbonization is.complete,..

4. The method of consisting infirst placing in a retortaresidueconsisting'o-f about 50% moisture and the remainder being crudefiber of argols, lime salts and sand, then heating untilcarbonizatio'nis com lete allowing the vapor formed to pass 0 during theheating;

5. The method of making a decolorizer consisting in dissolving argols incaustic soda to decompose the coloring matter, or

to render it insoluble, adding a compound making a decolorizer' soda todecompose the coloring matter, or to render it insoluble, introducingcarbonate of soda to precipitatethe lime, adding a compound ofpotassium, and finally heating the residue. until carbonization iscomplete.

7. As an article of manufacture for de- .-colorizing purposes avegetablecharcoal \vhich'is the product resulting from heating the residueextracted from argols consisting of fifty per cent. moisture and fiftyper cent. extracted argol residue, from which allbitartrate of potashhas been removed and consisting of or anic matter which is almostentirely crude bertogether with sand and earthy salts. k FREDERICK W.SPANUTIUS.

Witnesses HENRY BILLIGMEYER, DANIEL BUCKLEY.

